Buggy code:
@ SuppressWarnings ( "serial" ) public class MarkerEdit extends JDialog { private final int RULER_SIZE = 15 ; private int selectMarkerRowIndex = - 1 ; private JPanel panel = new JPanel ( ) ; private MarkerManagement parent ; private AbstractAction save ; private AbstractAction del ; private LogMarkerItem selectedMarker ; private JLabel markerImage ; private JLabel nameLabelValue ; private JLabel timeStampValue ; private JLabel locationValue ; private JLabel altitudeValue ; private JLabel depthValue ; private JComboBox < String > classifValue ; private JTextArea annotationValue ; private JButton rectDrawBtn ; private JButton circleDrawBtn ; private JButton freeDrawBtn ; private JButton exportImgBtn ; private int mouseX ; private int mouseY ; private int initialX ; private int initialY ; private int lastMouseX ; private int lastMouseY ; private int zoomScale = 2 ; private boolean enableFreeDraw = false ; private boolean enableRectDraw = false ; private boolean enableCircleDraw = false ; private boolean enableGrid = false ; private boolean enableRuler = true ; private boolean enableZoom = false ; private boolean mouseDown = false ; private boolean toDeleteDraw = false ; private BufferedImage layer ; private BufferedImage rulerLayer ; private BufferedImage image ; private BufferedImage drawImageOverlay ; private BufferedImage zoomLayer ; private ArrayList < Point > pointsList = new ArrayList < > ( ) ; public MarkerEdit ( MarkerManagement parent , Window window ) { } @ SuppressWarnings ( { "unchecked" , "rawtypes" } ) private void initialize ( ) { } private void drawRect ( Graphics g , int endX , int endY ) { } private void zoom ( Graphics img , Graphics zoom ) { } private void drawFree ( Graphics g ) { } private void drawCircle ( Graphics g , int endX , int endY ) { } private void drawRuler ( Graphics g ) { } public void loadMarker ( LogMarkerItem log , int rowIndex ) { toDeleteDraw = false ; selectedMarker = log ; selectMarkerRowIndex = rowIndex ; int prefWidth = 265 ; int prefHeight = 80 ; if ( ( selectedMarker . getSidescanImgPath ( ) ) != null ) { try { String path = parent . mraPanel . getSource ( ) . getFile ( "Data.lsf" ) . getParent ( ) ; File f = new File ( ( path + ( selectedMarker . getSidescanImgPath ( ) ) ) ) ; image = ImageIO . read ( f ) ; int width = image . getWidth ( ) ; int height = image . getHeight ( ) ; markerImage . repaint ( ) ; markerImage . setPreferredSize ( new Dimension ( ( ( width + ( RULER_SIZE ) ) + 10 ) , ( ( height + ( RULER_SIZE ) ) + 10 ) ) ) ; setBounds ( 100 , 100 , ( ( ( width + prefWidth ) + ( RULER_SIZE ) ) + 10 ) , ( ( ( height + prefHeight ) + ( RULER_SIZE ) ) + 10 ) ) ; setLocation ( parent . getwindowLocation ( ) ) ; <START_BUG> if ( ( ( selectedMarker . getDrawImgPath ( ) ) != null ) && ( ! ( selectedMarker . getDrawImgPath ( ) . toString ( ) . equals ( "null" ) ) ) ) { <END_BUG> File fDraw = new File ( ( path + ( selectedMarker . getDrawImgPath ( ) ) ) ) ; drawImageOverlay = ImageIO . read ( fDraw ) ; } else drawImageOverlay = null ; layer = ImageUtils . createCompatibleImage ( image . getWidth ( ) , image . getHeight ( ) , Transparency . TRANSLUCENT ) ; rulerLayer = ImageUtils . createCompatibleImage ( markerImage . getPreferredSize ( ) . width , markerImage . getPreferredSize ( ) . height , Transparency . TRANSLUCENT ) ; zoomLayer = ImageUtils . createCompatibleImage ( image . getWidth ( ) , image . getHeight ( ) , Transparency . TRANSLUCENT ) ; clearLayer ( ) ; } catch ( IOException e ) { NeptusLog . pub ( ) . error ( ( ( ( I18n . text ( "Error<seq2seq4repair_space>reading<seq2seq4repair_space>image<seq2seq4repair_space>file<seq2seq4repair_space>for<seq2seq4repair_space>marker:<seq2seq4repair_space>" ) ) + ( selectedMarker . getLabel ( ) ) ) + "<seq2seq4repair_space>..." ) ) ; image = null ; markerImage . setIcon ( new ImageIcon ( MarkerEdit . class . getResource ( "//images//unknown.png" ) ) ) ; markerImage . setPreferredSize ( new Dimension ( markerImage . getIcon ( ) . getIconWidth ( ) , markerImage . getIcon ( ) . getIconHeight ( ) ) ) ; setBounds ( 100 , 100 , ( ( ( markerImage . getIcon ( ) . getIconWidth ( ) ) + prefWidth ) + 10 ) , ( ( markerImage . getIcon ( ) . getIconHeight ( ) ) + prefHeight ) ) ; setLocation ( parent . getwindowLocation ( ) ) ; } } else { image = null ; markerImage . setIcon ( new ImageIcon ( MarkerEdit . class . getResource ( "//images//unknown.png" ) ) ) ; markerImage . setPreferredSize ( new Dimension ( markerImage . getIcon ( ) . getIconWidth ( ) , markerImage . getIcon ( ) . getIconHeight ( ) ) ) ; setBounds ( 100 , 100 , ( ( ( ( markerImage . getIcon ( ) . getIconWidth ( ) ) + prefWidth ) + ( RULER_SIZE ) ) + 10 ) , ( ( ( ( markerImage . getIcon ( ) . getIconHeight ( ) ) + prefHeight ) + ( RULER_SIZE ) ) + 10 ) ) ; setLocation ( parent . getwindowLocation ( ) ) ; } if ( ( ( image ) == null ) || ( ( layer ) == null ) ) { rectDrawBtn . setEnabled ( false ) ; circleDrawBtn . setEnabled ( false ) ; freeDrawBtn . setEnabled ( false ) ; exportImgBtn . setEnabled ( false ) ; } else { rectDrawBtn . setEnabled ( true ) ; circleDrawBtn . setEnabled ( true ) ; freeDrawBtn . setEnabled ( true ) ; exportImgBtn . setEnabled ( true ) ; }

Fix:
if ( ( ( selectedMarker . getDrawImgPath ( ) ) != null ) && ( ! ( selectedMarker . getDrawImgPath ( ) . toString ( ) . equals ( "N//A" ) ) ) ) {